Planet Masses, Radii, and Orbits from NASA’s K2 Mission

Planet Masses, Radii, and Orbits from NASA’s K2 Mission

We report the masses, sizes, and orbital properties of 86 planets orbiting 55 stars observed by NASA’s K2 Mission with follow-up Doppler measurements by the HIRES spectrometer at the W. M. Keck Observatory and the Automated Planet Finder at Lick Observatory. Eighty-one of the planets were discovered...

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Main Authors: Andrew W. Howard, Evan Sinukoff, Sarah Blunt, Erik A. Petigura, Ian J. M. Crossfield, Howard Isaacson, Molly Kosiarek, Ryan A. Rubenzahl, John M. Brewer, Benjamin J. Fulton, Courtney D. Dressing, Lea A. Hirsch, Heather Knutson, John H. Livingston, Sean M. Mills, Arpita Roy, Lauren M. Weiss, Bjorn Benneke, David R. Ciardi, Jessie L. Christiansen, William D. Cochran, Justin R. Crepp, Erica Gonzales, Brad M. S. Hansen, Kevin Hardegree-Ullman, Steve B. Howell, Sébastien Lépine, Arturo O. Martinez, Leslie A. Rogers, Joshua E. Schlieder, Michael Werner, Alex S. Polanski, Isabel Angelo, Corey Beard, Aida Behmard, Luke G. Bouma, Casey L. Brinkman, Ashley Chontos, Fei Dai, Paul A. Dalba, Steven Giacalone, Samuel K. Grunblatt, Michelle L. Hill, Stephen R. Kane, Jack Lubin, Andrew W. Mayo, Teo Mocnik, Joseph M. Akana Murphy, Malena Rice, Lee J. Rosenthal, Dakotah Tyler, Judah Van Zandt, Samuel W. Yee
Format: Article
Language:English
Published: IOP Publishing 2025-01-01
Series:The Astrophysical Journal Supplement Series
Subjects:
Exoplanet catalogs
Exoplanet astronomy
Radial velocity
Transit photometry
Online Access:https://doi.org/10.3847/1538-4365/adc5e4
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Summary:We report the masses, sizes, and orbital properties of 86 planets orbiting 55 stars observed by NASA’s K2 Mission with follow-up Doppler measurements by the HIRES spectrometer at the W. M. Keck Observatory and the Automated Planet Finder at Lick Observatory. Eighty-one of the planets were discovered from their transits in the K2 photometry, while five were found based on subsequent Doppler measurements of transiting planet-host stars. The sizes of the transiting planets range from Earth-size to larger than Jupiter (1–3 R _⊕ is typical), while the orbital periods range from less than a day to a few months. For 32 of the planets, the Doppler signal was detected with significance greater than 5 σ (51 were detected with >3 σ significance). An important characteristic of this catalog is the use of uniform analysis procedures to determine stellar and planetary properties. This includes the transit search and fitting procedures applied to the K2 photometry, the Doppler fitting techniques applied to the radial velocities (RVs), and the spectral modeling to determine bulk stellar parameters. Such a uniform treatment will make the catalog useful for statistical studies of the masses, densities, and system architectures of exoplanetary systems. This work also serves as a data release for all previously unpublished RVs and associated stellar activity indicators obtained by our team for these systems, along with derived stellar and planet parameters.
ISSN:0067-0049

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